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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Ba2As6O11 by Materials Project

Ba2As6O11 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.09 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.78–3.25 Å. There are six inequivalent As3+ sites. In the first As3+ site, As3+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.72–1.90 Å. In the second As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.73–1.90 Å. In the third As3+ site, As3+ is bonded in a 4-coordinate geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.73–1.93 Å. In the fourth As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.72–1.92 Å. In the fifth As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.81–1.84 Å. In the sixth As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.81–1.84 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Ba2+ and two As3+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As3+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and one As3+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one As3+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+ and one As3+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one As3+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As3+ atoms. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As3+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Ba2+ and two As3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba4As2O by Materials Project

Ba4As2O is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to five equivalent As3- and one O2- atom. There are one shorter (3.29 Å) and four longer (3.76 Å) Ba–As bond lengths. The Ba–O bond length is 3.07 Å. In the second Ba2+ site, Ba2+ is bonded in a distorted linear geometry to four equivalent As3- and two equivalent O2- atoms. All Ba–As bond lengths are 3.53 Å. Both Ba–O bond lengths are 2.61 Å. As3- is bonded in a 9-coordinate geometry to nine Ba2+ atoms. O2- is bonded to six Ba2+ atoms to form corner-sharing OBa6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3(AsO4)2 by Materials Project

Ba3(AsO4)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.61–2.99 Å. In the second Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to six equivalent O2- atoms. All Ba–O bond lengths are 2.80 Å. As5+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.72 Å) and three longer (1.73 Å) As–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Ba2+ and one As5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to four Ba2+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba(As2O7)2 by Materials Project

Ba(As2O7)2 crystallizes in the orthorhombic Pmna space group. The structure is three-dimensional. Ba is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ba–O bond distances ranging from 2.83–2.89 Å. There are two inequivalent As sites. In the first As site, As is bonded to six O atoms to form AsO6 octahedra that share corners with two equivalent AsO4 tetrahedra and an edgeedge with one AsO6 octahedra. There are a spread of As–O bond distances ranging from 1.80–1.93 Å. In the second As site, As is bonded to four O atoms to form corner-sharing AsO4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are a spread of As–O bond distances ranging from 1.72–1.75 Å. There are five inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two As atoms. In the second O site, O is bonded in a distorted single-bond geometry to one Ba and one As atom. In the third O site, O is bonded in a distorted single-bond geometry to one Ba and one As atom. In the fourth O site, O is bonded in a water-like geometry to two equivalent As atoms. In the fifth O site, O is bonded in a distorted single-bond geometry to one Ba and one As atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2As6O11 by Materials Project

Ba2As6O11 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.84–3.33 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.18 Å. There are six inequivalent As3+ sites. In the first As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is two shorter (1.82 Å) and one longer (1.85 Å) As–O bond length. In the second As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is one shorter (1.79 Å) and two longer (1.83 Å) As–O bond length. In the third As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.73–1.90 Å. In the fourth As3+ site, As3+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.70–1.91 Å. In the fifth As3+ site, As3+ is bonded in a 4-coordinate geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.72–1.95 Å. In the sixth As3+ site, As3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.72–1.91 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and one As3+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As3+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+ and two As3+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As3+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one As3+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one As3+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Ba2+ and two As3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to two Ba2+ and one As3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2As2O7 by Materials Project

Ba2As2O7 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.24 Å. In the second Ba2+ site, Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.74–2.99 Å. In the third Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–3.10 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.76–3.07 Å. There are four inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form corner-sharing AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.69–1.84 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form corner-sharing AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.70–1.82 Å. In the third As5+ site, As5+ is bonded to four O2- atoms to form corner-sharing AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.69–1.82 Å. In the fourth As5+ site, As5+ is bonded to four O2- atoms to form corner-sharing AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.69–1.83 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ba2+ and one As5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+ and one As5+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As5+ atoms. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ba2+ and one As5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one As5+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ba2+ and one As5+ atom. In the tenth O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one As5+ atom. In the eleventh O2- site, O2- is bonded to three Ba2+ and one As5+ atom to form distorted edge-sharing OBa3As tetrahedra. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+ and one As5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+ and two As5+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one As5+ atom.

36 MATERIALS SCIENCE↗